// Copyright 2022 Ant Group Co., Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include <chrono>

namespace yacl {
class ElapsedTimer {
 public:
  /**
   * create and start timer
   */
  ElapsedTimer();
  explicit ElapsedTimer(bool start_timer);

  double CountMs() const;
  double CountSec() const;

  void Restart();
  void Pause();
  void Resume();

 private:
  std::chrono::steady_clock::time_point begin_point_;
  double time_elapsed_us_;
  bool paused_;
};

}  // namespace yacl
